One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,9)(3,7,11,15)(4,6,12,8)(10,13,16,14)(17,18,22,24,21,25,20,30)(19,26,29,32,28,23,27,31)(2,6)(4,12)(7,13)(8,9)(10,16)(14,15)(17,19,22,29,21,28,20,27)(18,23,24,31,25,26,30,32)(1,3,5,11)(2,7,9,15)(4,10,12,16)(6,13,8,14)(17,18)(19,26)(20,24)(21,25)(22,30)(23,28)(27,32)(29,31)(2,6)(4,12)(7,13)(8,9)(10,16)(14,15)(17,20,21,22)(18,24,25,30)(19,27,28,29)(23,31,26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.